This jsfl command generates an animated gif file using selected frames from current timeline in Flash IDE.

If you want to change gif export settings edit Export Frames To GIF.jsfl file in your favourite text editor. Lines 2-9 contain export options.

Download version 1.0.4
mxp format (Adobe Extension Manager installation)
zip format (extract files to $Flash/Commands config folder [?])

Known bugs and issues
Works better when command is executed in main timeline.